I already have the game purchased from the Ubisoft store

[Luluísa (^._.^)ﾉ]

Is there any way to add this game to my Steam library if I purchased it from the Ubisoft store?
Or do I have to buy it on Steam too?

[☢DR.KeMiKiLL☢]

why would you need to buy it again?

[ZenienSight]

You will have to re-buy the game again if you want to have it through Steam.
No point in double dipping since you must sync it with your Ubisoft Account that already owns it.

[Rayne of Salt]

Originally posted by ☢DR.KeMiKiLL☢:

why would you need to buy it again?

Cos the expansion is currently 13 aussie dollarydoos on steam but 45 on ubisoft.

[ArmedGhost-]

Originally posted by Gata Meia Lenta:

Is there any way to add this game to my Steam library if I purchased it from the Ubisoft store?
Or do I have to buy it on Steam too?

You would have to re-buy. Even if you buy the game on Steam, the game still launches through Uplay. Only real reason to buy the game again is to support it.

I bought the game on Steam when it released on Steam just to support the dev team at the time, but never actually installed on Steam. I still play on Uplay

If you did buy it on Steam, it launches through Uplay and all of your progression still carries over. Not too sure how the DLC works. I.e if you own the DLC on Uplay, but only buy the base game on Steam.

[Sir_0v3rk1ll]

no, buy it again. I did and so did my entire family. Wait for it to be dirt cheap.

[Zenwolf]

I bought it on steam when it was dirt cheap and it connects fine with my existing uplay account dlc transferred over wasn't a problem don't know about dlc bought thru steam technically shouldn't be a problem but just don't know for sure.

[Reign In Blood]

This is really dumb on Ubisoft's part. I have it on Ubi, but can't play/launch through steam. Even though the game still requires the Ubi launcher and my accounts are linked, I still must buy it on the Steam platform. I play through Steam nearly exclusively, so this is truly a disappointment for me. Games requiring anything other than steam get much less game play.

[TheTool]

Originally posted by Reign In Blood:

This is really dumb on Ubisoft's part. I have it on Ubi, but can't play/launch through steam. Even though the game still requires the Ubi launcher and my accounts are linked, I still must buy it on the Steam platform. I play through Steam nearly exclusively, so this is truly a disappointment for me. Games requiring anything other than steam get much less game play.

Steam gonna get their 30 %.

[Bruce Campbell]

Yes, you can add The Division 2 ( non-steam game ) from Ubisoft to your Steam library.

From tomsguide.com:

Dedicated PC players normally have game libraries that stretch across a number of platforms. If you’re tired of going back and forth between launchers, be it GOG Galaxy, the Epic Games Store or Ubisoft Connect and want to access games from these apps through Steam, we’ve got you covered.

By following the steps below, you’ll quickly be able to add your favorite non-Steam games to Valve’s platform. After all, sometimes it’s just handy having all your favorite titles in the same place.
How to add non-Steam games to Steam

Open Steam, then select the Games tab.
Click ‘Add a Non-Steam game to my Steam Library’.
Select Browse to find your non-Steam game.
Find, select and open your game’s executable file.
Select your game, then click ‘Add Select Programs’.
Find your non-Steam game in your library, then play away!

[富士葵 『F U J I _A O I』]

Originally posted by Bruce Campbell:

Yes, you can add The Division 2 ( non-steam game ) from Ubisoft to your Steam library.

From tomsguide.com:

Dedicated PC players normally have game libraries that stretch across a number of platforms. If you’re tired of going back and forth between launchers, be it GOG Galaxy, the Epic Games Store or Ubisoft Connect and want to access games from these apps through Steam, we’ve got you covered.

By following the steps below, you’ll quickly be able to add your favorite non-Steam games to Valve’s platform. After all, sometimes it’s just handy having all your favorite titles in the same place.
How to add non-Steam games to Steam

Open Steam, then select the Games tab.
Click ‘Add a Non-Steam game to my Steam Library’.
Select Browse to find your non-Steam game.
Find, select and open your game’s executable file.
Select your game, then click ‘Add Select Programs’.
Find your non-Steam game in your library, then play away!

That's not the question OP is asking, if it were even OP knew the answer for it already.

OP is asking if its possible to transfer the ownership of Division 2 on Steam since they already have it on Uplay.